<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>canvas粒子动画</title>
    <style>
        #canvas{
            position: absolute;
            display: block;
            left:0;
            top:0;
            background: #0f0f0f;
            z-index: -1;
        }
    </style>
</head>
<body>
<canvas id="canvas"></canvas>
<script>

</script>
</body>
</html>